condition	mean	min	max
4 h after light	8.01534	7.7984800000000005	8.20637
8 h after light	8.087033333333334	7.8631899999999995	8.31938
12 h after light	8.06946	7.72508	8.30063
4 h after dark	8.341693333333334	8.22988	8.48949
8 h after dark	8.29177	7.97543	8.60684
12 h after dark	8.208633333333333	8.032860000000001	8.29745